Feature

●Useage --- Used for improved speaker cabinet, portable speaker, home speaker or car speaker. Add a really nice "bass reflex" effect to the built-in boxes in your speaker cabinet. Perfect for a subwoofer enclosure, speaker projects.
●Size --- The total length of the inverting tube is 117mm/4.61in, and the opening diameter of the speaker shell is 40mm/1.57in. Applicable to 3-4 inches speakers.
●High Quality --- The speaker port tube adopts high quality ABS plastic, it is sturdy and durable. The inner wall is smooth, both ends are bell opening design, the airflow is very smooth, significantly improve the airflow sound.
●Essential --- These Speaker Cabinet Port Tubes are ideal for building your own Speaker Cabinets or replacing old ones, which is an essential part of the Speaker Cabinet.
●Working Principle --- Speaker inverting holes, also called sound tubes and air holes, are often used in inverted speakers.The main principle is that the sound pressure of the airflow vibrating in the box is poured out to overlap the sound pressure in front of the speaker to produce a bass effect.

[Perforated 40 Tube]

Description

Specification:
Item Type: Woofer Connector Tube
Total Length: Approx. 117mm/4.61in (as picture)
Speaker Housing Opening Diameter: Approx. 40mm/1.57in (as picture)

Package List:
4 x Woofer Connector Tube